Underfloor Distribution of Auditorium
Underfloor Distribution of Auditorium
(OP)
Hi all
I have an underfloor distribution system to be designed to serve an auditorium, in the seating area, i am already using underfloor system for which i have raised floor, and return from top. While for the stage area, i have both options available i.e., i can either do underfloor or can do mixed air system (supply from top / return from below).
The question is that wheather this arrangement can work. As a whole there is one volume. the reason for this is because im skeptical about underfloor system for stage area. it can work or not. if not then i have to use mixxture system for stage area.
appereciate any response in advance
I have an underfloor distribution system to be designed to serve an auditorium, in the seating area, i am already using underfloor system for which i have raised floor, and return from top. While for the stage area, i have both options available i.e., i can either do underfloor or can do mixed air system (supply from top / return from below).
The question is that wheather this arrangement can work. As a whole there is one volume. the reason for this is because im skeptical about underfloor system for stage area. it can work or not. if not then i have to use mixxture system for stage area.
appereciate any response in advance





RE: Underfloor Distribution of Auditorium
A dedicated unit for the stage is the normal solution.The performers will have better control over temperature as well.
RE: Underfloor Distribution of Auditorium
RE: Underfloor Distribution of Auditorium
Whatever you supply behind the curtain, also return behind the curtain, the owners will not like it when the curtains sway due to airflow.
knowledge is power
RE: Underfloor Distribution of Auditorium
If i put both systems in auditorium, will there be some problem?
The whole auditorium is UFAD except the stage where its mixture. and if i do, can i do the stage with top supply, bottom return? (keeping in mind that rest of the area is supply at bottom).
or if i have to go for mixture system at stage, i have to have both supply / return from top?
RE: Underfloor Distribution of Auditorium
In regards to the stage,you need to have supply and return at high levels, the return going past the light bar so that you can account for atleast 70% of lighting load in return air load.As CB noted be mindful of humidity issues when using a displacement system.Cooling and reheating will be required.Given the large ventilation requirement,the theatre UFAD will most likely be a full fresh air system with scope for energy recovery.
RE: Underfloor Distribution of Auditorium
Yes, there may be some stage lighting heat, but think about the fundamentals - there will be some radiant heat from the spotlights, but 90% of the heat rises up off the lamps in the bouyant plumes, so a lot of the heat from the lights does not become part of the comfort cooling load on the stage.
Just google ASHRAE's UFAD and DV Guide as well as the REHVA DV Guidebooks.
RE: Underfloor Distribution of Auditorium